Particle Nature of Electromagnetic Radiation
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CHXI02:STRUCTURE OF ATOM

307377 A light whose frequency is equal to \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{14}}}}{\rm{Hz}}\) is incident on a metal whose work function is 2 eV \({\rm{(h = 6}}{\rm{.63 \times 1}}{{\rm{0}}^{{\rm{ - 34}}}}{\rm{Js,}}\,{\rm{1}}\,{\rm{eV = 1}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 19}}}}{\rm{J)}}\). The maximum energy of electrons emitted will be

1 \({\rm{2}}{\rm{.49}}\,{\rm{eV}}\)
2 \({\rm{4}}{\rm{.49}}\,{\rm{eV}}\)
3 \({\rm{0}}{\rm{.49}}\,{\rm{eV}}\)
4 \({\rm{5}}{\rm{.49}}\,{\rm{eV}}\)
CHXI02:STRUCTURE OF ATOM

307378 With regard to the photoelectric effect, identify the correct statement among the following

1 Numbers of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the frequency of the incident light
2 Number of \({{\rm{e}}^{\rm{ - }}}\) electrons ejected increases with the increase in work function
3 Number of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
4 Energy of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
KCET - 2020
CHXI02:STRUCTURE OF ATOM

307379 Photons of frequency \(\mathrm{3.2 \times 10^{16} \mathrm{~Hz}}\) is used to irradiate a metal surface, the maximum kinetic energy of the emitted photo-electron is \(\mathrm{\dfrac{3^{\text {th }}}{4}}\) of the energy of the irradiating photon. What is the threshold frequency of the metal?

1 \(\mathrm{2.4 \times 10^{25} \mathrm{~Hz}}\)
2 \(\mathrm{2.4 \times 10^{16} \mathrm{~Hz}}\)
3 \(\mathrm{1.6 \times 10^{15} \mathrm{~Hz}}\)
4 \(\mathrm{8 \times 10^{15} \mathrm{~Hz}}\)
CHXI02:STRUCTURE OF ATOM

307380 A metal surface is exposed to solar radiations

1 The emitted electrons has energy less than a maximum value of energy depending upon the frequency of the incident radiation.
2 The emitted electrons have energy less than the maximum value of energy depending upon intensity of incident radiations.
3 The emitted electrons have zero energy.
4 The emitted electrons have energy equal to energy of photons of incident light.
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CHXI02:STRUCTURE OF ATOM

307377 A light whose frequency is equal to \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{14}}}}{\rm{Hz}}\) is incident on a metal whose work function is 2 eV \({\rm{(h = 6}}{\rm{.63 \times 1}}{{\rm{0}}^{{\rm{ - 34}}}}{\rm{Js,}}\,{\rm{1}}\,{\rm{eV = 1}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 19}}}}{\rm{J)}}\). The maximum energy of electrons emitted will be

1 \({\rm{2}}{\rm{.49}}\,{\rm{eV}}\)
2 \({\rm{4}}{\rm{.49}}\,{\rm{eV}}\)
3 \({\rm{0}}{\rm{.49}}\,{\rm{eV}}\)
4 \({\rm{5}}{\rm{.49}}\,{\rm{eV}}\)
CHXI02:STRUCTURE OF ATOM

307378 With regard to the photoelectric effect, identify the correct statement among the following

1 Numbers of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the frequency of the incident light
2 Number of \({{\rm{e}}^{\rm{ - }}}\) electrons ejected increases with the increase in work function
3 Number of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
4 Energy of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
KCET - 2020
CHXI02:STRUCTURE OF ATOM

307379 Photons of frequency \(\mathrm{3.2 \times 10^{16} \mathrm{~Hz}}\) is used to irradiate a metal surface, the maximum kinetic energy of the emitted photo-electron is \(\mathrm{\dfrac{3^{\text {th }}}{4}}\) of the energy of the irradiating photon. What is the threshold frequency of the metal?

1 \(\mathrm{2.4 \times 10^{25} \mathrm{~Hz}}\)
2 \(\mathrm{2.4 \times 10^{16} \mathrm{~Hz}}\)
3 \(\mathrm{1.6 \times 10^{15} \mathrm{~Hz}}\)
4 \(\mathrm{8 \times 10^{15} \mathrm{~Hz}}\)
CHXI02:STRUCTURE OF ATOM

307380 A metal surface is exposed to solar radiations

1 The emitted electrons has energy less than a maximum value of energy depending upon the frequency of the incident radiation.
2 The emitted electrons have energy less than the maximum value of energy depending upon intensity of incident radiations.
3 The emitted electrons have zero energy.
4 The emitted electrons have energy equal to energy of photons of incident light.
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CHXI02:STRUCTURE OF ATOM

307377 A light whose frequency is equal to \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{14}}}}{\rm{Hz}}\) is incident on a metal whose work function is 2 eV \({\rm{(h = 6}}{\rm{.63 \times 1}}{{\rm{0}}^{{\rm{ - 34}}}}{\rm{Js,}}\,{\rm{1}}\,{\rm{eV = 1}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 19}}}}{\rm{J)}}\). The maximum energy of electrons emitted will be

1 \({\rm{2}}{\rm{.49}}\,{\rm{eV}}\)
2 \({\rm{4}}{\rm{.49}}\,{\rm{eV}}\)
3 \({\rm{0}}{\rm{.49}}\,{\rm{eV}}\)
4 \({\rm{5}}{\rm{.49}}\,{\rm{eV}}\)
CHXI02:STRUCTURE OF ATOM

307378 With regard to the photoelectric effect, identify the correct statement among the following

1 Numbers of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the frequency of the incident light
2 Number of \({{\rm{e}}^{\rm{ - }}}\) electrons ejected increases with the increase in work function
3 Number of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
4 Energy of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
KCET - 2020
CHXI02:STRUCTURE OF ATOM

307379 Photons of frequency \(\mathrm{3.2 \times 10^{16} \mathrm{~Hz}}\) is used to irradiate a metal surface, the maximum kinetic energy of the emitted photo-electron is \(\mathrm{\dfrac{3^{\text {th }}}{4}}\) of the energy of the irradiating photon. What is the threshold frequency of the metal?

1 \(\mathrm{2.4 \times 10^{25} \mathrm{~Hz}}\)
2 \(\mathrm{2.4 \times 10^{16} \mathrm{~Hz}}\)
3 \(\mathrm{1.6 \times 10^{15} \mathrm{~Hz}}\)
4 \(\mathrm{8 \times 10^{15} \mathrm{~Hz}}\)
CHXI02:STRUCTURE OF ATOM

307380 A metal surface is exposed to solar radiations

1 The emitted electrons has energy less than a maximum value of energy depending upon the frequency of the incident radiation.
2 The emitted electrons have energy less than the maximum value of energy depending upon intensity of incident radiations.
3 The emitted electrons have zero energy.
4 The emitted electrons have energy equal to energy of photons of incident light.
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CHXI02:STRUCTURE OF ATOM

307377 A light whose frequency is equal to \({\rm{6 \times 1}}{{\rm{0}}^{{\rm{14}}}}{\rm{Hz}}\) is incident on a metal whose work function is 2 eV \({\rm{(h = 6}}{\rm{.63 \times 1}}{{\rm{0}}^{{\rm{ - 34}}}}{\rm{Js,}}\,{\rm{1}}\,{\rm{eV = 1}}{\rm{.6 \times 1}}{{\rm{0}}^{{\rm{ - 19}}}}{\rm{J)}}\). The maximum energy of electrons emitted will be

1 \({\rm{2}}{\rm{.49}}\,{\rm{eV}}\)
2 \({\rm{4}}{\rm{.49}}\,{\rm{eV}}\)
3 \({\rm{0}}{\rm{.49}}\,{\rm{eV}}\)
4 \({\rm{5}}{\rm{.49}}\,{\rm{eV}}\)
CHXI02:STRUCTURE OF ATOM

307378 With regard to the photoelectric effect, identify the correct statement among the following

1 Numbers of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the frequency of the incident light
2 Number of \({{\rm{e}}^{\rm{ - }}}\) electrons ejected increases with the increase in work function
3 Number of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
4 Energy of \({{\rm{e}}^{\rm{ - }}}\) ejected increases with the increase in the intensity of incident light
KCET - 2020
CHXI02:STRUCTURE OF ATOM

307379 Photons of frequency \(\mathrm{3.2 \times 10^{16} \mathrm{~Hz}}\) is used to irradiate a metal surface, the maximum kinetic energy of the emitted photo-electron is \(\mathrm{\dfrac{3^{\text {th }}}{4}}\) of the energy of the irradiating photon. What is the threshold frequency of the metal?

1 \(\mathrm{2.4 \times 10^{25} \mathrm{~Hz}}\)
2 \(\mathrm{2.4 \times 10^{16} \mathrm{~Hz}}\)
3 \(\mathrm{1.6 \times 10^{15} \mathrm{~Hz}}\)
4 \(\mathrm{8 \times 10^{15} \mathrm{~Hz}}\)
CHXI02:STRUCTURE OF ATOM

307380 A metal surface is exposed to solar radiations

1 The emitted electrons has energy less than a maximum value of energy depending upon the frequency of the incident radiation.
2 The emitted electrons have energy less than the maximum value of energy depending upon intensity of incident radiations.
3 The emitted electrons have zero energy.
4 The emitted electrons have energy equal to energy of photons of incident light.
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